If a young person has the opportunity to start their own business, they should pursue it with everything they have. I can't work for people. Starting my own business 16 years ago was the best thing I ever did. I haven't been an employee since.
The only tax disincentive is the extra 7.65% in SE tax. It takes a little bit of self discipline to put that money away. In fact the biggest reason small businesses fail is because when they get paid by the customer, they see that as all profit. I tell my clients that if they make $100, 30% should be rat holed and forgotten about.
